Monitor



FIG. 1 is a front perspective view showing my new design, a handle being shown in an upper position;

FIG. 2 is a rear perspective view thereof, the handle being shown in a lower position; and

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a top plan view thereof;

FIG. 5 is an elevation view of the side opposite to that shown in FIG. 1; and

FIG. 6 is a rear elevation view. 

The ornamental design for a monitor, as shown and described. 